<?php 
/**
 * 加载自定义函数库
 *
 * 只是出现warning
 * include
 * include_once
 * 
 * 出现致命错误
 * require
 * require_once
 */
	//只能调用一次
	include "./phpfolder/exercise.php";
	//可以重复多次调用
	include "./phpfolder/exercise.html";
	include "./phpfolder/exercise.txt";
	one();
	two();
	three();

	//require "./phpfolder/exercise.php";
	require "./phpfolder/exercise.html";
	require "./phpfolder/exercise.txt";


 ?>